Replace your low-end bundled earbuds with this rich-sounding in-ear set from Klipsch.
Buy.com

Let's face it: the earbuds that came with your iPod, MP3 player, smartphone, or whatever probably bite. For my money, nothing beats the sound you get from in-ear earphones, which have the added benefit of reducing outside noise.

Ultimately, if you're not satisfied with the sound coming out of your stock earbuds, or you just want something that's better at isolating outside noise, these will do the trick. Klipsch has a stellar reputation in the world of audio, and $25 is a very reasonable price to pay for this kind of gear.

Bonus deal: Today's Giveaway of the Day giveaway is a good one: Paragon Drive Copy 10 Personal SE (Win). It's great for creating an exact clone of your hard drive (one of my preferred backup methods).